On the velocity at wind turbine  and propeller actuator discs

van Kuik, Gijs A. M.

doi:https://doi.org/10.5194/wes-5-855-2020

Articles | Volume 5, issue 3

https://doi.org/10.5194/wes-5-855-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/wes-5-855-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 5, issue 3

Research article

|

07 Jul 2020

Research article |

| 07 Jul 2020

On the velocity at wind turbine and propeller actuator discs

Gijs A. M. van Kuik

Data sets

Background data for the paper: On the velocity at wind turbine and propeller actuator discs, published in Wind Energy Science G. A. M. van Kuik https://doi.org/10.4121/uuid:c0c94590-2071-470b-bb0e-52f420cbb950

Short summary

The paper compares actuator discs in propeller and wind turbine mode. At very low rotational speed, propeller discs have an expanding wake while still energy is put into the wake. The velocity at the disc in the plane containing the axis is practically uniform: a few per mille deviation for wind turbine discs and a few per cent for propeller discs. The deviations are caused by the different strengths of the singularity in the wake boundary vorticity strength at its leading edge.